\begin{tikzpicture}[croix/.pic={\draw[thick,black] (-0.067,-0.067) --
        (0.067,0.067) (-0.067,0.067)--(0.067,-0.067);}]
    \filldraw[draw=black,fill=black!10!white] (0,0) circle[radius=2.8];
    \filldraw[draw=red,fill=red!10!white,rounded corners]
      (-0.5,2.5) -- (-0.5,-0.5) -- (2.2,-1.5) -- (2.2,1.5) -- cycle;
    \filldraw[draw=blue,fill=blue!10!white,rounded corners]
      (-2.2,1) -- (-1.7,1.5) -- (-1.2,1) -- (-1.2,-0.5) -- (0,-1.5) --
      (0.5,-2) -- (0,-2.5) -- (-2.2,-1.5) -- cycle;
    \filldraw[draw=green,fill=green!10!white,rounded corners,opacity=0.5]
      (-2.3,1.5) -- (0,2.5) -- ((0.5,2) -- (0.5,0) -- (0,-0.5) --
      (-2.3,0.5)  -- cycle;
    \draw (0,0) pic {croix} node[above=1mm]{$\spt3$}
          (90:2) pic {croix} node[below=1mm]{$\spt1$}
          (150:2) pic {croix} node[below=1mm]{$\spt6$}
          (210:2) pic {croix} node[below right=1mm]{$\spt2$}
          (-90:2) pic {croix} node[left=1mm]{$\spt4$}
          (-30:2) pic {croix} node[above=1mm]{$\spt7$}
          (30:2) pic {croix} node[above=1mm]{$\spt5$};
    \draw[red,thick] (2.18,1.43) -- (2.7,2) node[above right]{$A$};
    \draw[blue,thick] (-2.17,-1.47) -- (-2.7,-2) node[below left]{$B$};
    \draw[green,thick] (-2.27,1.47) -- (-2.8,2) node[above left]{$C$};
  \end{tikzpicture}
